Catalysts for the polymerization of olefins and process for the preparation thereof
CA 2274903 A1 · Owner: Schut, Peter A. · Inventors: Van Baar, Jan F.; Van Kessel, Gerard M. M.; Von Hebel, Klaas L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Catalysts for the polymerization of olefins are disclosed comprising the , product obtainable by contacting: (A) a bridged and/or substituted cyclopentadienyl compound of Ti, Zr or Hf; (B) one or more organometallic aluminium compounds of formula (II): A1R43-zHz wherein the substituents R4 same or different from each other, are linear or branched saturated or , unsaturated C1-C20 alkyl or alkylaryl radicals optionally containing Si or Ge , atoms wherein at least one of the substituents R4 is different from a straight alkyl group; z is 0 or 1; and (C) water; the molar ratio between the organometallic aluminium compound and water being comprised between 1:1 and 100:1; said catalyst being …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed October 23, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 23, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 23, 2020.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.